基于FPGA架构的高可靠在轨重构系统设计

Highly reliable on-orbit reconfiguration system based on FPGA architecture

摘要:

航天设备与地面设备相比，制造成本高，对空间环境的适应性要求也高。为了延长航天器寿命，提高其在轨工作的可靠性，需要考虑航天器在空间环境下的可维护性需求。针对航天资产在轨软件实现功能维护的需求，研究空间环境应用背景下的高可靠在轨可重构技术。基于FPGA芯片在航天器领域中应用的广泛性、灵活性及可靠性，设计了一种FPGA架构下的高可靠在轨重构系统。该系统的优势在于充分利用星载设备中普遍使用的“SRAM型FPGA+反熔丝FPGA”的硬件架构，在实现SRAM型FPGA动态刷新功能的基础上仅通过软件更改来增加在轨重构功能，极大降低了硬件更改的成本，扩展了可重构功能的应用范围。在某航天器星载设备中应用该在轨重构系统，通过实际飞行经历，验证了该架构系统设计方案的可行性、可扩展性及可靠性。

Abstract:

The difference between equipment on-orbit and equipment on-earth is that the manufacturing cost is high， and the adaptability requirements for the space environment are high. In order to extend the life of the spacecraft and improve the reliability of the on-orbit equipment， it is necessary to consider the maintainability needs of the spacecraft.Aiming at the requirements of on-orbit software and functional maintenance of space systems， this paper focuses on space highly reliable on-orbit reconfiguration technology under the background of space environment application. Based on the extensiveness， flexibility and reliability of FPGA in spacecraft applications， a highly reliable on-orbit reconfiguration system based on FPGA architecture is designed. The advantage of the architecture is that it makes full use of the hardware architecture of "SRAM FPGA+antifuse FPGA" commonly used in equipment on-orbit， and only adds the on-orbit reconfigurable function through software changes on the basis of realizing the SRAM FPGA dynamic refresh function， which greatly reduces the cost of hardware change and expands the application of reconfigurable function.This paper gives a specific scheme of one spacecraft project， which verifies the feasibility， scalability and reliability.